U.S. Patent & Trademark Office
    Attorney Roster
    Inventor Resources
    Fees
    Forms
    Patent searching and downloading
    Manual of Patent Examining Procedure
    Patent, Trademark Depository Libraries (PTDLs)
    Patent Office Magazine
    Patent Rules (takes a while to download)
    Patent Laws

European Patent Search service of the British Patent Office

Google Patent Search search nearly all patents by key word

Zimmer Foundation provides information for assisting inventors and entrepreneurs 

Thomas Register publishes a directory of manufacturers

Great Lakes Patent & Trademark Center PTDL

Canadian Patent Office

British Patent Office

WIPO (The World Intellectual Property Organization)

European Patent Office

Japanese Patent Office

U.S. Copyright Office

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All rights reserved.